Definition

Gastrointestinal System

Causes

Giardiasis is caused by a tiny parasite.
Giardia
cysts are a resistant form of the parasite that can survive outside a human or animal body. These cysts cause the spread of this disease. For infection to occur, a person must ingest
Giardia
cysts by mouth. After cysts are ingested, the parasites start growing and multiplying in the small intestine. Ingesting as few as ten parasitic cysts can cause an infection.

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